I have to many favorites to pick one above the rest. 5 of the ones I use the most are... Octavia - (for defenses with corpus/orokin) Limbo - (defenses with grineer/infested) Saryn - (focus/relic farming in eso) Loki - (sabotage/spy/rescue anything I don't need to actively kill) Inaros - (whenever I feel face tanking)